Time Period - Only two of three of these need to be used in a string. First & Last, First & Count, or Last & Count. Last & Count will return results the easiest.

first (STRING) - Defines the start of the time period. If January 1 2012 to February 21, 2012 was the specification required, start with specifying the the first time point with first=2011-01-01. Alternatively, say the specification was between yesterday and today.

Example(s): first=2011-01-01 first=1323466328 or first=yesterday

last (STRING) - Defines the end of a time period. To continue the example above, if the date range specified is January 1, 2012 to February 21, 2011, specify last=2011-02-21. Alternatively say the time period you always wanted to measure was today. One could specify last=today, and then use count to specify 14, 30, up to 1000 days back relative to the time range enabled for the account on the API.

Example: last=2012-02-21 or last=1318195928 OR Yesterday OR Today OR Now

count (STRING) - Count is used as a period proxy to specified time periods. The standard time period is a day, so using count, you would specify the last 30, 60, 90, 100, to 1000 days by specifying last=today & count=30 (or another period length).

Example: count=1 OR 10 OR 100 OR 1000 to specify the time period backward or forward